Rōmon means "tower gate" and, as the name suggests, this type of gate has a higher floor with a balcony (that isn't actually used) and a single roof. Sometimes, the Rōmon gate may be confused with the more impressive Nijūmon type of gate, which has a roof for each floor, and the upper floor space is usable.
EXIF info:
Nikon Df
Lens: 24-70mm F/2.8G
Focal Length: 31mm
Aperture: F/5
Shutter Speed: 1/2000s
ISO Sensitivity: ISO 1600